WXtoImg: software to decode APT and WEFAX signals from weather satellites Anonymous Surfing & Free Proxy List Available proxy servers stats Proxy servers for registered members:15191 Free sample proxy servers:140 Proxy list will be updated in:57 seconds Local server time:00:19:27 UTC 140 free sample proxy servers Download proxy list as txt, csv or xml You can download proxy list with personal download link.
RF - CML Microcircuits - Building Blocks Applications: Data over radio: MSK, FSK, GMSK, QPSK, QAM Wideband modulation systems up to 50MHz Linear and non-linear modulation schemes Wireless telemetry Marine AIS systems Software Defined Radio (SDR) Satellite terminals Digital TV - CATV mod. Wi-Max implementations Analogue, digital and multimode radio: TETRA, APCO, dPMR, DMR, PDT CML's range of Radio Frequency (RF) products provides a selection of modular building blocks for implementation as part or all of the 'wireless front-end' of a wide range of constant and non-constant envelope modulation systems. The new RF Building Block range is designed to provide flexible, high-performance ICs required for HF/VHF/UHF professional radios, wireless data terminals, wireless microphones and marine and avionics radio systems. CML's RF devices are designed for use in a wide range of both narrowband and wideband applications, in the wireless data and digital PMR markets. Receiver Transmitters Transceivers Glossary
Around blocking How to install the Circumventor program, which gets around all Web-blocking software Bennett Haselton This page describes how to install the "Circumventor" program, which can be used to get around all Web blocking programs. However, Please Note!! You don't actually install the Circumventor on the computer that is blocked from accessing Web sites. You, or a friend of yours, has to install the Circumventor on some other machine which is not censored. For example, if you want to get around Web blocking at work, don't install the Circumventor on your work computer. If you want to, please enter your email address below if you would like to receive updates about the Circumventor software. How to install the Circumventor The machine where you install the Circumventor must have a fast Internet connection (not dial-up), and it must be running Windows XP or 2000 (this includes most computers these days). To install: Download ActivePerl from this link and install it. Happy surfing! Special thanks
DVI2PAR - a video HDMI/DVI decoder for the beagleboard Support this project: or send me something from my Amazon wishlist. From the day i received my beagleboard rev. B7 i was missing an easy way to use the digital video interface with a small LCD screen. This page describes a cheap and simple yet flexible HDMI to parallel 3.3v interface. The beagleboard running Maemo5 on a 7" 800x480 TFT The hardware The hardware is rather simple and doesn't consist of much more than the TFP101A panel link receiver from TI. The schematic The printed circuit board Obtaining the parts The main components is the TFP101A. Attaching the dvi2par to the display The dvi2par is meant to directly interface to the LCD board. The dvi2par mounted on top the displays old controller pcb Also visible in this picture is the fact that only the upper 6 of the 8 color bits available on the dvi2par are being used. EDID/DDC support The archive contains some scripts (prom.sh) and a tool (eeprom.c) to write the ddc data to the eeprom using the depicted i2c-tiny-usb setup. Downloads Links
How-To Bypass Egypt Block for Facebook & Twitter « Texnomic I've Created a FREE VPN Server for ALL Egyptians to bypass Internet Blockage in Egypt and to "Empower The Revolution" of #Jan25 This (Virtual Private Network) VPN Connect creates an Unblockable and Secure Connection to our Server in USA to bypass ALL Internet Blockage in Egypt (Example: Facebook, Twitter and Dostor). Special Thanks for the team members: @Wael_Aziz and @Sherif_ and @Hend_Hafez Announcements: Update 1: Egypt Revolution 2.0 Completed Successfully. Update 2: Egypt Revolution 2.0 Completed Successfully.
Software Defined Radio for Mariners: Weather Satellites - Antennas Summary: two meters of wire and a meter of coax for a good antenna, 5 meters of wire and a wood frame for an excellent antenna. Cost is less than 10 euros, construction time is maximum one hour for the example here.Read on to find out how. Your antenna choices for Weather Satellites are: 1. Materials Wire - the thicker the better. I've built and tested different versions of the following antennas, best performance with easiest construction is discussed here. Portable Turnstile Built and tested six different versions, received the image on the right with the version below. Wire - Cut four (4) 55 cm wire. If it is foam (same material as a coffee cup, soft to the touch) you need 43 and 86 cm long cables. Assembly Mount the four terminals at 90 degrees to each other, like North, East, South and West on the compass rose. Congratulations, now you have a turnstile antenna! Transform this to an eggbeater antenna: QFH, the Spiral antenna Frame support: Your choice. Dimensions Support / Frame
Software Defined Radio for Mariners: Review: LNA4All Antenna Amplifier Summary: buy one, works as advertised. What is it? A small electronic device making radio signals 100-150 times stronger. Officially called a low-noise amplifier, LNA for short. Costs 25 euros delivered, helps you hear and see more targets of interest. Why? - To run the RTLstick with less gain, - To get the maximum from your antennas, - To add range to your reception ability. Testing setup Commercial radio, airplane speech, Weather satellite signals, AIS and airplane position signals are tested. Commercial radio / Upconverter range Signal strength increase as promised. Airband Performance slightly better than expected. Airplane chatter between Plane and Approach/Tower/Ground comes booming in, much better audio, pilot seems talking to you. Weather Satellites / NOAA APT reception Signals are visibly stronger in the waterfall display (quickly connected the LNA during a recent pass), less banded noise in images, same noise floor requires less gain in SDRSharp. Marine Band / AIS What you get
Tutorial: Cheap ADS-B Aircraft RADAR The RTL-SDR can be used as a super cheap real time air radar. Modern planes use something called an ADS-B (Automatic Dependent Surveillance-Broadcast) Mode-S transponder, which periodically broadcasts location and altitude information to air traffic controllers. The RTL-SDR can be used to listen to these ADS-B signals, which can then be used to create your very own home aircraft radar system. Compared to dedicated commercial ADS-B receivers which can go for between $200 – $1000, the $20 RTL-SDR is very attractive for the hobbyist in terms of price. ADS-B broadcasts at a frequency of 1090 MHz. We also now note that recently new higher end SDR’s like the $199 Airspy have developed very good ADS-B receivers that are several times more sensitive that the RTL-SDR. Examples of RTL-SDR used as an ADS-B air radar In this video, YouTube user Superphish shows a timelapse of air traffic over New Zealand using RTL-SDR, ADSB# and Virtual Radar Server. A working RTL-SDR dongle. ADS-B Antennas dump1090
Tutorial: Receiving Weather Balloon (Radiosonde) Data with RTL-SDR Around the world meteorological weather balloons are launched twice daily, and continuously transit weather telemetry to a ground station using something called a radiosonde. The RTL-SDR software defined radio combined with a decoding program can be used to intercept this telemetry, and display it on your own computer. You will be able to see real time graphs and data of air temperature, humidity, pressure as well as the location and height of the balloon as it makes it’s ascent. Note that currently, this won’t work in the USA, as there are no decoding programs available for use with the telemetry protocol used in the states. This tutorial is also applicable to other software defined radios such as the Funcube dongle, HackRF, BladeRF or even hardware radios with discriminator taps, but the RTL-SDR is the cheapest option that will work. Examples In this example YouTube user Superphish shows a radiosonde being received and decoded using a RTL-SDR, SDRSharp and SondeMonitor. Tutorial Antennas
Electronics Forum -> Machined Cubesat Chassis Made Of Aluminum First, look in your city's phone book under "machine shops". Google the same term if you get no joy from the phone book. I just found & looked at the detailed plans for your mechanical setup, & you will need CNC. Most jobbing machine shops have CNC machines now anyway. What area of the globe are you in? Trouble rather the tiger in his lair, than the sage among his books.For to you, kings & armies are things mighty & enduring.To him, mere toys of the moment, to be overturned at the flick of a finger. Fortuna favet fortibus. Structure « EquiSat In order to meet the specifications detailed for CubeSats and meet the mission goal of accessibility for EQUiSat, we are paying close attention developing robust construction methods and procedures. A key feature of the structure system is the “mono-block” chassis. This design provides maximal specific strength and minimal geometric tolerance stack-up. Design Notes Robust, integrated fasteners for mounting of 1-2 PCBsExternal mounting holes on crossbars for solar panel and LED panel attachmentAll major features 8.5mm min. thickness Manufacturing Notes Milled from a single piece of 6061 Aluminum stockUsed only a basic 3 axis CNC millStructure and tolerance to conform to CubeSat specification The second iteration of the chassis is now in development. Further reducing weight by using thinner cross beamsIncreasing the number of internal fastening points for componentsAlterations in the precise mounting locations of the necessary printed circuit boards Mechanical Assembly Component Potting
Footprint (satellite) An example of an elliptical footprint with a reception area of Germany, Austria and Switzerland. The ellipses indicate the necessary antenna diameter for receiving in cm. Footprint maps usually show either the estimated minimum satellite dish diameter required or the signal strength in each area measured in dBW. Deployable Antenna System for CubeSats Overview The ISIS deployable antenna system contains up to four tape spring antennas of up to 55 cm length. The system can accommodate up to four monopole antennas, which deploy from the system after orbit insertion. The wires are melted using two redundant heating elements per wire. Depending on the configuration, one or two radios in the CubeSat can connect to the antenna system by means of miniature RF connectors. The antenna system has been designed for maximum compatibility with existing COTS CubeSat components. Available Configurations Supply Voltage 5V and 8V available on demand30 mm diameter centre through-hole for pass-through of payload or other interfaces (for mono/dipole configurations)ISIS Solar panel on topMagnetorquer integrated in top panelADCS sensor set (sun sensor/temp sensor)Various RF antenna configurations 4 VHF and/or UHF monopolesSingle VHF or UHF dipoleDual VHF and/or UHF dipoleVHF or UHF turnstileCombination of Dipole + Monopole Features Performance